Publications by authors named "Won-Suk Park"

6 Publications

  • Page 1 of 1

Clinical Impact of Preoperative Relief of Jaundice Following Endoscopic Retrograde Cholangiopancreatography on Determining Optimal Timing of Laparoscopic Cholecystectomy in Patients with Cholangitis.

J Clin Med 2021 Sep 22;10(19). Epub 2021 Sep 22.

Department of Internal Medicine, Liver Research Institute, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Korea.

Background: About 10% of patients with gallbladder (GB) stones also have concurrent common bile duct (CBD) stones. Laparoscopic cholecystectomy (LC) after removal of CBD stones using endoscopic retrograde cholangiopancreatography (ERCP) is the most widely used method for treating coexisting gallbladder and common bile duct stones. We evaluated the optimal timing of LC after ERCP according to clinical factors, focusing on preoperative relief of jaundice.

Methods: A total of 281 patients who underwent elective LC after ERCP because of choledocholithiasis and cholecystolithiasis from January 2010 to April 2018 were retrospectively reviewed. We compared the hospital stay, perioperative morbidity, and rate of surgical conversion to open cholecystectomy according to the relief of jaundice before surgery. These enrolled patients were divided into two groups: relief of jaundice before surgery (group 1, = 125) or not (group 2, = 156).

Results: The initial total bilirubin level was higher in group 1; however, there were no significant differences in the other baseline characteristics including age, sex, American Society of Anesthesiologists score, previous surgical history, white blood cell count, C-reactive protein, and operative time between the two groups. There was also no significant difference in postoperative hospital stay between the two groups (4.5 ± 3.3 vs. 5.5 ± 5.6 days, = 0.087). However, after ERCP, the waiting time until LC was significantly longer in group 1 (5.0 ± 4.9 vs. 3.5 ± 2.4 days, < 0.001). There were no statistical differences in the conversion rate (3.2% vs. 3.8%, = 0.518) or perioperative morbidity (4.0% vs. 5.8%, = 0.348), either.

Conclusions: LC would not be delayed until the relief of jaundice after ERCP since there were no significant differences in perioperative morbidity or surgical conversion rate to open cholecystectomy. Early LC after ERCP may be feasible and safe in patients with cholangitis and cholecystolithiasis.
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http://dx.doi.org/10.3390/jcm10194297DOI Listing
September 2021

Unilateral versus bilateral Y-type stent-in-stent metal stent insertions in inoperable malignant hilar biliary strictures: A multicenter retrospective study.

Hepatobiliary Pancreat Dis Int 2021 Aug 14. Epub 2021 Aug 14.

Department of Internal Medicine, College of Medicine, Daejeon St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.

Background: To date, there is controversy regarding unilateral versus bilateral stent placement in patients with malignant hilar biliary strictures (MHBSs). The aim of this study was to compare the clinical outcomes and complications of unilateral and bilateral (stent-in-stent method) stent placements for these patients.

Methods: We conducted a multicenter retrospective analysis of patients with inoperable MHBS who underwent endoscopic self-expandable metal stent (SEMS) placement from January 2009 to December 2019. Two groups classified according to the stent procedure method were compared for demographic, procedural, and postprocedure factors. Survival analysis for patency loss and overall survival was also conducted.

Results: A total of 236 subjects were included. A superior technical success rate was found in the unilateral stent group (98.8% vs. 82.5%, P < 0.001), whereas the clinical success rate was higher in the bilateral group (85.7% vs. 70.5%, P = 0.028). There was no significant difference with respect to complications or patency loss, and the bilateral group had better overall survival (P < 0.01). In the Cox proportional hazard model, MHBSs from lymph node compression were associated with a higher risk of death (HR = 9.803, P = 0.003). In contrast, bilateral SEMS insertion showed reduced postprocedural mortality (HR = 0.316, P = 0.001).

Conclusions: Y-type stent-in-stent bilateral SEMSs are technically difficult but demonstrated more favorable overall survival for palliative bile drainage of inoperable MHBS patients compared to unilateral insertions.
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http://dx.doi.org/10.1016/j.hbpd.2021.08.002DOI Listing
August 2021

Production of ERCP training model using a 3D printing technique (with video).

BMC Gastroenterol 2020 May 11;20(1):145. Epub 2020 May 11.

Research Group for Endoscopic Instruments and Stents, Korean Society of Gastrointestinal Endoscopy, Seoul, Korea.

Background: ERCP training models are very different in terms of anatomical differences, ethical issues, storage problems, realistic tactile sensation, durability and portability. There is no easy way to select an optimized model for ERCP training. If the ERCP training model could be made as a soft silicone model using 3D printing technique, it would have numerous advantages over the models presented so far. The purpose of this study was to develop an optimized ERCP training model using a 3D printing technique and to try to find ways for implementing various practical techniques.

Methods: All organ parts of this model were fabricated using silicone molding techniques with 3D printing. Especially, various anatomy of the ampulla of Vater and common bile duct (CBD) were creatively designed for different diagnostic and therapeutic procedures. In order to manufacture each of the designed organ parts with silicone, a negative part had to be newly designed to produce the molder. The negative molders were 3D printed and then injection molding was applied to obtain organ parts in silicone material. The eight different types of ampulla and CBD were repeatedly utilized and replaced to the main system as a module-type.

Results: ERCP training silicone model using 3D technique was semi-permanently used to repeat various ERCP procedures. All ERCP procedures using this model could be observed by real-time fluoroscopic examination as well as endoscopic examination simultaneously. Using different ampulla and CBD modules, basic biliary cannulation, difficult cannulation, stone extraction, mechanical lithotripsy, metal stent insertion, plastic stent insertion, and balloon dilation were successfully and repeatedly achieved. Endoscopic sphincterotomy was also performed on a specialized ampulla using a Vienna sausage. After repeat procedures and trainings, all parts of organs including the ampulla and CBD modules were not markedly damaged or deformed.

Conclusions: We made a specialized ERCP training silicon model with 3D printing technique. This model is durable, relatively cheap and easy to make, and thus allows the users to perform various specialized ERCP techniques, which increases its chances of being a good ERCP training model.
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http://dx.doi.org/10.1186/s12876-020-01295-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7216470PMC
May 2020

Eupatilin Ameliorates Cerulein-Induced Pancreatitis Via Inhibition of the Protein Kinase D1 Signaling Pathway In Vitro.

Pancreas 2020 02;49(2):281-289

Department of Pathology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Republic of Korea.

Objective: The aim of this study was to investigate the effects of eupatilin on protein kinase D1 (PKD1) and nuclear factor kappa B (NF-κB) signaling pathways in cerulein-induced in vitro pancreatitis.

Methods: We used collagenase digestion to isolate pancreatic acinar cells from male C57BL/6 mice. In vitro acute pancreatitis was induced by treatment with a supramaximal dose of cerulein. Eupatilin was pretreated before stimulation with cerulein.

Results: Eupatilin significantly reduced cerulein-induced amylase release in pancreatic acini. Eupatilin treatment downregulated cerulein-induced expression of interleukin (IL)-1β, IL-6, and CC chemokine ligands 2 and 5, but it upregulated expression of IL-4 and IL-10. We demonstrated that eupatilin pretreatment attenuated cerulein-induced necrosis in isolated pancreatic acinar cells. This effect of eupatilin was confirmed by lactic dehydrogenase assay, fluorescence-activated cell sorting analysis, and cytopathologic analysis. Eupatilin inhibited cerulein-induced activation of PKD1/NF-κB and the nuclear translocation of NF-κB.

Conclusions: Our data demonstrated that eupatilin is a potential therapeutic candidate for the treatment of pancreatitis through its ability to reduce cellular necrosis and inflammatory responses by inhibition of the PKD1/NF-κB signaling pathway.
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http://dx.doi.org/10.1097/MPA.0000000000001488DOI Listing
February 2020

Technical Reports of Endoscopic Retrograde Cholangiopancreatography Guidewires on the Basis of Physical Properties.

Clin Endosc 2020 Jan 6;53(1):65-72. Epub 2019 Aug 6.

Research Group for Endoscopic Instruments and Stents, Korean Society of Gastrointestinal Endoscopy, Seoul, Korea.

Background/aims: Using an appropriate guidewire can increase the success rate of selective cannulation in endoscopic retrograde cholangiopancreatography. The purpose of this technical study was to investigate the characteristics of each guidewire type and to evaluate its efficiency and rapidity of insertion.

Methods: We conducted a three-point bending test using a universal testing machine to investigate the flexibility and bending features of each guidewire. 3D-printed silicone tubes with various types of stricture and a hand-made biliary tree silicone model with six-stranded intrahepatic ducts were used to evaluate the success rate and insertion time of each guidewire.

Results: In the three-point bending test, the characteristics of each guidewire were classified. We found that the bending strengths and times were independent of shaft thickness. Using two in vitro biliary duct models, we determined that the success rate and total insertion time were better for guidewires with a resilient shaft and angled tip than for other types of guidewires (p<0.001). Although thickness of the guidewire affected the success rate (p<0.05), it did not affect the total insertion time (p≥0.05).

Conclusion: Among several types of guidewire, some factors (resilient shaft, highly flexible, and angled tip) appeared to be associated with the efficiency and rapidity of the guidewire insertion.
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http://dx.doi.org/10.5946/ce.2019.114DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7003007PMC
January 2020

A rare collision tumor comprising intracystic papillary neoplasm associated with adenocarcinoma and angiosarcoma in the gallbladder.

Korean J Intern Med 2020 05 31;35(3):732-733. Epub 2019 Jul 31.

Department of Pathology, College of Medicine, Daejeon St. Mary's Hospital, The Catholic University of Korea, Daejeon, Korea.

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http://dx.doi.org/10.3904/kjim.2018.394DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7214352PMC
May 2020
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